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Integrated EMI/Thermal Design forSwitching Power SuppliesWei ZhangThesis submitted to the Faculty of theVirginia Polytechnic Institute and State Universityin partial fulfillment of the requirements for the degree of
Integrated EMI/Thermal Design forSwitching Power SuppliesWei Zhang(ABSTRACT)This work presents the modeling and analysis of EMI and thermal performancefor switch power supply by using the CAD tools. The methodology and design guidelinesare developed.By using a boost PFC circuit as an example, an equivalent circuit model is builtfor EMI noise prediction and analysis. The parasitic elements of circuit layout andcomponents are extracted analytically or by using CAD tools. Based on the model, circuitlayout and magnetic component design are modified to minimize circuit EMI. EMI filtercan be designed at an early stage without prototype implementation.In the second part, thermal analyses are conducted for the circuit by using thesoftware Flotherm, which includes the mechanism of conduction, convection andradiation. Thermal models are built for the components. Thermal performance of thecircuit and the temperature profile of components are predicted. Improved thermalmanagement and winding arrangement are investigated to reduce temperature.In the third part, several circuit layouts and inductor design examples are checkedfrom both the EMI and thermal point of view. Insightful information is obtained.
標簽：
EMI
開關電源
英文
上傳時間：
2013-11-16
上傳用戶：萍水相逢
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Abstract: How can an interface change a happy face to a sad face? Engineers have happy faces when an interface works properly.Sad faces indicate failure somewhere. Because interfaces between microprocessors and ICs are simple—even easy—they are oftenignored until interface failure causes sad faces all around. In this article, we discuss a common SPI error that can be almostimpossible to find in a large system. Links to interface tutorial information are provided for complete information. Noise as a systemissue and ICs to minimize its effects are also described.
標簽：
集成電路
通用接口
上傳時間：
2013-11-18
上傳用戶：zgz317
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先進的窗口管理器?？梢栽谀愕淖烂嫔蠈崿F凍結、解凍、更名、設置總在最上面、設置不總在最上面、閃爍、最大化、最小化、聚焦、隱藏、顯示和中斷一個可視或不可視窗口的功能。 An advanced window manager that allows you to freeze, dfreeze, rename, set always on top, set not always on top, flash, maximize, minimize, focus, hide, show or terminate an visible or invisible window on your desktop.
標簽：
advanced
window
窗口
可視
上傳時間：
2015-03-25
上傳用戶：qq21508895
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This version of malloc for VxWorks contains two different algorithms. One is the BSD based Kingsley "bucket" allocator which has some unique fragmentation behavior. The other is Doug Lea s well tested allocator that tries to minimize fragmentation while keeping the speed/space requirements.
非常實用,可移植用作實現跨平臺的嵌入式的內存分配機制.
標簽：
algorithms
different
Kingsley
contains
上傳時間：
2015-08-28
上傳用戶：hfmm633
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追加最小化按鈕：
利用JNI，給Java Dialog追加最小化按鈕。
Add minimize box to java dialog。
標簽：
JNI
按鈕
上傳時間：
2013-12-06
上傳用戶：dragonhaixm
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BNB20 Finds the constrained minimum of a function of several possibly integer variables.
％ Usage: [errmsg,Z,X,t,c,fail] =
％ BNB20(fun,x0,xstatus,xlb,xub,A,B,Aeq,Beq,nonlcon,settings,options,P1,P2,...)
％
％ BNB solves problems of the form:
％ minimize F(x) subject to: xlb <= x0 <=xub
％ A*x <= B Aeq*x=Beq
％ C(x)<=0 Ceq(x)=0
％ x(i) is continuous for xstatus(i)=0
％ x(i) integer for xstatus(i)= 1
％ x(i) fixed for xstatus(i)=2
％
標簽：
constrained
variables
function
possibly
上傳時間：
2014-01-13
上傳用戶：youth25
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ST7529液晶驅動 The ST7529 is a driver & controller LSI for 32 gray scale graphic dot-matrix liquid crystal display systems. It generates 255
Segment and 160 Common driver circuits. This chip is connected directly to a microprocessor, accepts Serial Peripheral
Interface (SPI), 8-bit/16-bit parallel or IIC display data and stores in an on-chip display data RAM. It performs display data
RAM read/write operation with no external operating clock to minimize power consumption. In addition, because it contains
power supply circuits necessary to drive liquid crystal, it is possible to make a display system with the fewest components.
標簽：
7529
controller
dot-matrix
graphic
上傳時間：
2013-12-02
上傳用戶：奇奇奔奔
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With the successful implementation of XML Schema, developers are learning how to increase productivity, improve software reliability, minimize development time, and decrease time to market. This in-depth reference is an all-in-one resource designed to help developers leverage the power and potential of XML schemas by offering a complete roadmap to their creation, design, and use.
標簽：
implementation
successful
developers
productivi
上傳時間：
2013-12-08
上傳用戶：gxrui1991
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ST7787 芯片的SPEC，比亞迪2.4inchLCM的SPEC。The ST7787 is a single-chip controller/driver for 262K-color, graphic type TFT-LCD. It consists of 720 source line and
320 gate line driving circuits. This chip is capable of connecting directly to an external microprocessor, and accepts Serial
Peripheral Interface (SPI), 8-bits/9-bits/16-bits/18-bits parallel interface. Display data can be stored in the on-chip display
data RAM of 240x320x18 bits. It can perform display data RAM read/write operation with no external operation clock to
minimize power consumption. In addition, because of the integrated power supply circuits necessary to drive liquid crystal,
it is possible to make a display system with the fewest components.
標簽：
7787
SPEC
ST
芯片
上傳時間：
2016-09-22
上傳用戶：woshini123456
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The MAX481E, MAX483E, MAX485E, MAX487E–MAX491E,
and MAX1487E are low-power transceivers for RS-485 and
RS-422 communications in harsh environments. Each driver
output and receiver input is protected against ±15kV electrostatic
discharge (ESD) shocks, without latchup. These parts
contain one driver and one receiver. The MAX483E,
MAX487E, MAX488E, and MAX489E feature reduced slewrate
drivers that minimize EMI and reduce reflections caused
by improperly terminated cables, thus allowing error-free
data transmission up to 250kbps. The driver slew rates of the
MAX481E, MAX485E, MAX490E, MAX491E, and MAX1487E
are not limited, allowing them to transmit up to 2.5Mbps.
標簽：
MAX
transceivers
485
low-power
上傳時間：
2013-12-22
上傳用戶：小寶愛考拉
